EN ISO 10322-2:1997 Opthalmic Optics - Semi-Finished Spectacle Lens Blanks - Part 2: Specifications for Progressive Power Lens Blanks ISO 10322-2: 1996
2016EN ISO 10322-2:2016 Ophthalmic optics - Semi-finished spectacle lens blanks - Part 2: Specifications for progressive-power and degressive-power lens blanks
2006EN ISO 10322-2:2006 Opthalmic Optics - Semi-Finished Spectacle Lens Blanks - Part 2: Specifications for Progressive Power Lens Blanks
1997EN ISO 10322-2:1997 Opthalmic Optics - Semi-Finished Spectacle Lens Blanks - Part 2: Specifications for Progressive Power Lens Blanks ISO 10322-2: 1996